Burglar alarm fixture



s. E. TYMINSKI BURGLAR ALARM FIXTURE Filed Feb. 4, 1943 T- H... WWWWM Jan. 18,

Ylatented Jan. 18, 1944 UNITED STATES 'PATENT OFFICE BURGLAR ALARM FIXTURE Stanley E. Tyminski, Bridgeport, Conn.

Application February 4, 1943, Serial No. 474,713

(Cl. D-54) 4 Claims.

My invention relates to new and useful improvements in window burglar alarm fixtures and has for an obj ect to provide a fixture that may be quickly and readily installed in a window frame and connected to a source of electric energy and a bell so that when the sash is raised the bell will ring until the sash is lowered.

Another object of the invention is to provide an electric fixture to be installed in the Window frame at a desired distance from the bottom of the frame so that the window sash may be raised slightly before the alarm is actuated but not far enough to permit the body of an intruder to pass therethrough, and the fixture so constructed that after the window is raised beyond this point as long as a cooperating, actuating part mounted in the sash is in contact with the fixture, the signal will continue to ring.

Still another object of the invention is to provide an electrical fixture which has several points of electric contact in the member that is to be depressed, and the fixture so arranged that one of the points of electrical contact will close the circuit on a slight raising of the sash, but should the sash be raised to nearly its full height a second point of electrical contact will also complete the circuit, thus providing against a rapid raising of the sash which might momentarily sound the alarm but which circuit would then be broken.

Still another object of the invention is to pro vide an electrical fixture wherein the parts are enclosed within a housing so that to install the fixture it is but a relatively simple matter to cut out a pocket in the window frame, install the iixture and connect the lead wires thereto, while likewise in the window sash proper it will be necessary only to out out a small pocket and put in a spring pressed member for operating the fixture mounted in the window frame.

Still another object of the invention is to provide an electrical fixture which may be of any desired length and be provided with several points of contact so that even though the member that carries these contacts is tilted (depressed) rst in one direction by the raising of the sash and then in the opposite direction, one cf the points of contact will also be in electrical contact with a cooperating plate to thus insure that the alarm will ring as long as the sash is in an open position.

With these and other objects in view the invention consists in certain new and novel arrangements and combination of parts as will be hereinafter more fully described and pointed out in the claims.

Referring now to the drawing showing a preferred embodiment,

Fig. 1 is a fragmentary elevational View, parts being in section to show the installation of the window alarm fixture, the lower sash being in its closed position;

Fig. 2 is an enlarged Vertical sectional View of the fixture showing the same connected to an alarm and showing the parts in their non-operative position;

Fig. 3 is a View similar to Fig. 2 showing a fragmentary sectional portion of the lower frame and sash and showing the fixture now as in its operative position to sound the alarm;

Fig. 4 is a face view of the fixture when installed in the window sash;

Fig. 5 is a vertical sectional View taken on line 5-5 of Fig. 2;

Fig. 6 is a cross sectional view taken on line 6-6 of Fig. 2;

Fig. '7 is a similar View taken on line I-l of Fig. 2; and

Fig. 8 is a plan view of the actuating button or member that depresses a part of the fixture to close the electric circuit.

Referring now more specifically to the several views, there is fragmentarily shown a portion I of a window frame with the upper sash 2 and the lower sash 3. It will be noted that the Window frame I is cut out near its bottom as at 4 to receive the fixture shortly to be mentioned, While registering with this pocket is a channel or slot 5 through which will pass the electric wire 6 which will lead from the electrical fixture to a battery 'I or other source of electrical energy and to which will be connected the electric bell or gong 8. Y

There will also be noticed in the lower portion of the sash 4 a pocket 9 in which is mounted a resilient contacter Ill which may also be seen in section in Fig. 3, and which will hereinafter be referred to as a button.

Before describing the electrical fixture which forms the gist of the invention, the small button I0 might be described. As may be seen from Fig. 3 it consists of a small casing II which is box-like in cross section and is provided with two small springs I2 which in turn are placed about the guide pins I3 that arevfastened to the linner end of a plate I4, which plate may be of fiber or composition.

The opposite ends I5Yof this plate I4 pass'under the ends of a cut out face plate I67which is fastened by the screws Il within thewindow sash. The purpose of this button is to provide a resilient spring pressed member that will give slightly when coming in contact with the electrical iixture about to be described to thus prevent unnecessary wear.

It will be noticed that the plate il?. will flex slightly but the springs nevertheless are strong enough to force the plate of the electrical lixture, about to be described, inwardly when the xture and its button come into contact.

There are no electrical connections to this button, it simply providing a mechanical means for depressing a plate in the electrical fixture shortly to be described.

Referring now more particularly to the gist of the invention and to Figs. 2 to 7 for the Inoment, it will be seen that the xture comprises a metal casing I8 rectangular in shape and having the upper and lower ends i9 and 2li and these ends bend outwardly to form the respective lips 2l through which may be passed the screws 22 to fasten this fixture to the window frame when being installed. The casing is open at its top so that the movable member 23 may be placed therein as will be shortly mentioned. Fitting over the casing l@ and the movable member 23 will be the slotted plate 24 to permit the top portion of the movable member to extend slightly therethrough. lThe plate 24 beyond the extremities of the slot is provided with holes so that the aforementioned screws 22 may hold this plate to its casing lil when the parts are assembled, as will be readily understood. It might also be mentioned that when the movable member 23 is installed within its casing and the plate 2d placed on the same the plate may be spot welded at its ends to the ends 2li of the casing so that the casing and its parts will remain in their assembled position and the xture may be sold or shipped as a complete unit ready for installation.

Referring now to the casing i8 it will be noticed that in the bottom thereof there is placed a cement or other desired non-conducting lller 25 which partly covers the bottom casing and mounted in the cement end so as to be insulated from the casing is the metal plate 26.

Extending through the bottom of the casing .may be seen the binding post 2l which, yit is to .be remembered, is insulated with respect to the casing, there being seen a small insulating washer 28 between the binding nut and the bottom of the casing so that both the plate 2t and its binding post are fully insulated with respect to the casing, and to this binding post, of course, -will extend one of the lead wires 6.

Secured to the casing i8 just above the heretofore mentioned binding post 21 is a second binding post 29 which is in electrical contact with the casing i8, and from this binding post will extend the other end of the heretofore mentioned wires 6.

The binding post 2l first mentioned also helps to hold the end of the metal plate 26 in place. The plate 26 is also provided with an opening 3] about midway of its length and this opening also passes `through the rear casing so that a guide pin about to be mentioned can pass therethrough. This pin must also be insulated with respect to the plate 26. Likewise there are two other openings 3| at the rear of the casing near its ends, but these do not have to be insulated, as they are beyond the ends of the live plate 2%.

Having thus described the casing with its elec- .trically insulated plate mounted on the bottom, mention will now be made of what I term the operating member 23. This member 23 is formed of metal, is of inverted U-shape in cross section and is slightly bumped as at 32 so that the face of the U-shaped member may extend through the slot of the top plate heretofore mentioned.

Extending from the inner under surface of this member 23 are the three guide posts 33 which extend through the aforementioned respective openings in the bottom of the casing. Likewise small springs Sli are fitted about these posts, the center spring being insulated from the live plate 23 heretofore mentioned. These springs 34 normally therefore keep the movable member 23' in its outermost position as may be seen in Figs. 1 and 2. That is, the outer surface of the member 23 extends out beyond the inner face of its casing.

Also secured to the inner under surface of this member 23 may be seen the helical contact springs which may be soldered to their carrier. rThese springs are normally not in contact with the live plate 26 as may be clearly seen from Fig. 2, but they will be in contact .with this live plate when the movable member 23 is forced inwardly by a raising of the lower sash 3 and the button if) coming in contact therewith. The movable member 23, it will be understood, is always in circuit with its casing but is not in electrical contact with the live plate 26 until it is forced inwardly.

Having described the several parts, its operation Will be readily understood and therefore need be but brieily described.

Operation When the lower sash 3 is raised the projecting button lil which is in the path of the xture and in fact extends in a plane slightly beyond that of the fixture, comes in contact with the movable plate 23 and will force the lower end thereof (see Fig. 3) inwardly so that the spring 35 will now contact with the plate 26, thus completing the circuit between the casing and the live plate to energize the bell 3 to thus give the alarm.

On a continued raising of the lower sash the movable plate 23 will still be forced inwardly and when the button i5 reaches the upper end of the plate the upper spring 35 will be forced inwardly to now contact with the live plate and even though the lower end of the plate 23 and the spring tilts away from the live plate, the upper spring 35 being in contact with the live plate will cause the bell to continue to ring.

l't will be understood that the electrical fixture mounted in the window frame I may be of any length desired and may be positioned so that when the window is open to its full extent one of the upper springs will be still in contact with the slide plate to cause the bell to ring until such time as the window is lowered.

It will also be understood that a similar lixture and button might be mounted in the upper portion of the frame and upper sash respectively, and connected to the bell, so that a raising or lowering of the upper sash as well as the lower would cause the bell to sound the alarm.

From the foregoing it will be seen that the electric fixture is one that may be sold as a complete unit and, together with the button, may be readily installed and due to its flexibility should give long service.

Other forms of buttons l@ may be used if desired, the one necessary feature being that it should be ilexible but not so flexible that it will not actuate and move the movable member 23 of the xture inwardly on a raising or lowering of the sash.

Many slight changes might be made without departing from the scope of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

i. In an electric burglar ralarm xture for installation in a vertically operated window frame, and to be operated by a movement of the window sash having a button for depressing said electric fixture, including a metal casing, a conductor plate mounted in said casing and insulated therefrom, a depressable housing mounted in said casing and in electric contact therewith, said housing having a plurality of ieXible spring electric contacts mounted on its inner surface and normally out of contact with the plate mounted in the bottom of the casing, the said movable member when forced inwardly at its one end causing one of the said spring electric conn tacts to engage said plate in the bottom of the casing to thereby complete a circuit between the movable member and the plate mounted in the bottom of the casing and a continued raising or the sash with its button causing the movable member to tilt inwardly at its upper end to thereby cause another one of said ilexible spring electric contacts to engage said plate and likewise complete an electric circuit.

2. An electric fixture for a burglar alarm circuit including a metal casing, a slotted cover plate mounted on said casing, a tiltable housing mounted insaid casing and normally extending through said slotted plate, spring means for holding the housing member in its outermost position, a conductor plate mounted in the bot tom of the casing extending substantially throughout the length of the same and insulated from said casing, a plurality of flexible electric contact members carried on the inner face of said tiltable housing and normally out of contact with the plate in the bottom of the casing, a binding post connected to the casing and a second binding post insulated from said casing and connected to said plate in the bottom of the casing, said tiltable housing adapted to be pressed inwardly in a plane parallel with said plate and also to tilt in planes disposed at an angle to said plate and said housing member when tilted causing at least one flexible electric contact member carried by the housing to contact with the plate mounted in the bottom of the housing.

3. An electric xture for burglar alarm circuits including a metal casing, an inverted U- shaped housing member mounted in said casing, spring means for holding said housing member in an outward position, the housing member' in electrical contact with the casing, a conductor plate carried in the botto-m of the casLig and insulated therefrom, electric contacts carried by the housing member in the form of helical springs and normally out of contact with said last mentioned plate, said housing member adapted to be forced inwardly throughout its length, a depressing of said housing member causing at least one of said helical springs to Contact with the conductor plate, binding posts connected respectively to the casing and to the f conductor plate, and the last mentioned bind ing post being insulated with respect to the casing and the contacting of a helical spring with its plate adapted to close the alarm circuit.

4. An electric burglar alarm fixture for vertically movable window sashes, including a metal casing, an electric conductor plate mounted in the bottom of said casing and insulated therefrom, a movable member also mounted in said casing and in electric contact therewith, said movable member having a plurality of flexible electric contacts mounted on its inner surface and normally out of contact with the conductor plate, said movable member when forced inwardly from its one end towards the other end causing said spring electric contacts to nrogressively engage said conductor plate to thereby complete a circuit between the movable member and the said conductor plate.

STANLEY E. TYMINSKI 

